{
    "action": "tool_call",
    "reasoning": "I need to find the exact row count and the time period covered by the dataset by querying the _ingestion_timestamp column.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT COUNT(*) as total_rows, MIN(_ingestion_timestamp) as min_time, MAX(_ingestion_timestamp) as max_time FROM raw.Iris",
        "purpose": "Get row count and time period",
        "source": "raw"
    }
}